Events can have a label assigned to them. Labels let you categorize events with names, color coding and filtering.
Figure: Day Window.
Use the Labels window to create and maintain your set of labels. See Labels Window.
Figure: Labels Window.
Label shortcuts
To assign a series of events to the same label, select the label in the Label window by clicking in the left column. Then option click the label display area next to the events in the Day window.
See Adding Items, Changing Items, Deleting Items, Rescheduling Events.